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Max Planck Institute Für Kohlenforschung
The Max-Planck-Institut für Kohlenforschung (german: Max-Planck-Institut für Kohlenforschung) is an institute located in Mülheim an der Ruhr, Germany specializing in chemical research on catalysis. It is one of the 86 institutes in the Max Planck Society (''Max-Planck-Gesellschaft''). It was founded in 1912 in Mülheim an der Ruhr as the Kaiser Wilhelm Institute for Coal Research (''Kaiser-Wilhelm-Institut für Kohlenforschung'') to study the chemistry and uses of coal, and became an independent Max Planck Institute in 1949. Research The Institute carries out basic research in organic and organometallic chemistry, in homogeneous and heterogeneous catalysis as well as in theoretical chemistry. The principal aim is to develop new methods for the selective and environmentally benign preparation of new compounds and materials. The MPI KoFo has been at the forefront of research in chemistry since its formation. One of these is the development of the Fischer–Tropsch process th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal
Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years. Vast deposits of coal originate in former wetlands called coal forests that covered much of the Earth's tropical land areas during the late Carboniferous ( Pennsylvanian) and Permian times. Many significant coal deposits are younger than this and originate from the Mesozoic and Cenozoic eras. Coal is used primarily as a fuel. While coal has been known and used for thousands of years, its usage was limited until the Industrial Revolution. With the invention of the steam engine, coal consumption increased. In 2020, coal supplied about a quarter of the world's primary energy and over a third of its electricity. Some iron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Franz Joseph Emil Fischer
Franz Joseph Emil Fischer (19 March 1877 in Freiburg im Breisgau – 1 December 1947 in Munich) was a German chemist. He was the founder and first director of the Kaiser Wilhelm Institute for Coal Research. He is known for the discovery of the Fischer–Tropsch process. Career In 1925, he and Hans Tropsch discovered the Fischer–Tropsch process. This allowed for the production of liquid hydrocarbons from carbon monoxide and hydrogen with metal catalyst at temperatures of 150–300 °C (302–572 °F). In 1930, he and Hans Schrader developed the Fischer assay, a standardized laboratory test for determining the oil yield from oil shale to be expected from a conventional shale oil extraction. He also worked with Wilhelm Ostwald and Hermann Emil Fischer. In 1913, he became the Director of the Kaiser Wilhelm Institute for Coal Research in Mülheim. He joined the NSDAP in 1933, and remained in office until his retirement in 1943. Awards *Wilhelm Exner Medal The W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asymmetric Counteranion-directed Catalysis
Asymmetric counteranion directed catalysis (ACDC) or chiral anion catalysis in enantioselective synthesis is the "induction of enantioselectivity in a reaction proceeding through a cationic intermediate by means of ion pairing with a chiral, enantiomerically pure anion provided by the catalyst". Although chiral Brønsted acid catalyzed reactions may well fall into this category of catalysis under the definition given here (e.g., protonation of an imine by a chiral phosphoric acid), the extent of proton transfer and the demarcation between hydrogen bonding and full proton transfer is often ambiguous. Hence, some authors may exclude ion pair formation by proton transfer as a type of chiral counteranion catalysis. The discussion below will focus on chiral ion pairs generated through means other than proton transfer. (''For a discussion about chiral Brønsted acid catalyzed reactions, see the article on hydrogen bond catalysis.'') The concept of utilizing the counteranion as the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proline
Proline (symbol Pro or P) is an organic acid classed as a proteinogenic amino acid (used in the biosynthesis of proteins), although it does not contain the amino group but is rather a secondary amine. The secondary amine nitrogen is in the protonated form (NH2+) under biological conditions, while the carboxyl group is in the deprotonated −COO− form. The "side chain" from the α carbon connects to the nitrogen forming a pyrrolidine loop, classifying it as a aliphatic amino acid. It is non-essential in humans, meaning the body can synthesize it from the non-essential amino acid L-glutamate. It is encoded by all the codons starting with CC (CCU, CCC, CCA, and CCG). Proline is the only proteinogenic secondary amino acid which is a secondary amine, as the nitrogen atom is attached both to the α-carbon and to a chain of three carbons that together form a five-membered ring. History and etymology Proline was first isolated in 1900 by Richard Willstätter who obtained the amino ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enantioselective Synthesis
Enantioselective synthesis, also called asymmetric synthesis, is a form of chemical synthesis. It is defined by IUPAC as "a chemical reaction (or reaction sequence) in which one or more new elements of chirality are formed in a substrate molecule and which produces the stereoisomeric (enantiomeric or diastereomeric) products in unequal amounts." Put more simply: it is the synthesis of a compound by a method that favors the formation of a specific enantiomer or diastereomer. Enantiomers are stereoisomers that have opposite configurations at every chiral center. Diastereomers are stereoisomers that differ at one or more chiral centers. Enantioselective synthesis is a key process in modern chemistry and is particularly important in the field of pharmaceuticals, as the different enantiomers or diastereomers of a molecule often have different biological activity. Overview Many of the building blocks of biological systems such as sugars and amino acids are produced exclusively as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biocatalysis
Biocatalysis refers to the use of living (biological) systems or their parts to speed up (catalyze) chemical reactions. In biocatalytic processes, natural catalysts, such as enzymes, perform chemical transformations on organic compounds. Both enzymes that have been more or less isolated and enzymes still residing inside living cells are employed for this task. Modern biotechnology, specifically directed evolution, has made the production of modified or non-natural enzymes possible. This has enabled the development of enzymes that can catalyze novel small molecule transformations that may be difficult or impossible using classical synthetic organic chemistry. Utilizing natural or modified enzymes to perform organic synthesis is termed chemoenzymatic synthesis; the reactions performed by the enzyme are classified as chemoenzymatic reactions. History Biocatalysis underpins some of the oldest chemical transformations known to humans, for brewing predates recorded history. The olde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transition Metals
In chemistry, a transition metal (or transition element) is a chemical element in the d-block of the periodic table (groups 3 to 12), though the elements of group 12 (and less often group 3) are sometimes excluded. They are the elements that can use d orbitals as valence orbitals to form chemical bonds. The lanthanide and actinide elements (the f-block) are called inner transition metals and are sometimes considered to be transition metals as well. Since they are metals, they are lustrous and have good electrical and thermal conductivity. Most (with the exception of group 11 and group 12) are hard and strong, and have high melting and boiling temperatures. They form compounds in any of two or more different oxidation states and bind to a variety of ligands to form coordination complexes that are often coloured. They form many useful alloys and are often employed as catalysts in elemental form or in compounds such as coordination complexes and oxides. Most are strongly paramagn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organocatalysis
In organic chemistry, organocatalysis is a form of catalysis in which the rate of a chemical reaction is increased by an organic catalyst. This "organocatalyst" consists of carbon, hydrogen, sulfur and other nonmetal elements found in organic compounds.Special Issue: Because of their similarity in composition and description, they are often mistaken as a misnomer for enzymes due to their comparable effects on reaction rates and forms of catalysis involved. Organocatalysts which display secondary amine functionality can be described as performing either enamine catalysis (by forming catalytic quantities of an active enamine nucleophile) or iminium catalysis (by forming catalytic quantities of an activated iminium electrophile). This mechanism is typical for covalent organocatalysis. Covalent binding of substrate normally requires high catalyst loading (for proline-catalysis typically 20–30 mol%). Noncovalent interactions such as hydrogen-bonding facilitates low catalyst l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organic Synthesis
Organic synthesis is a special branch of chemical synthesis and is concerned with the intentional construction of organic compounds. Organic molecules are often more complex than inorganic compounds, and their synthesis has developed into one of the most important branches of organic chemistry. There are several main areas of research within the general area of organic synthesis: ''total synthesis'', ''semisynthesis'', and ''methodology''. Total synthesis A total synthesis is the complete chemical synthesis of complex organic molecules from simple, commercially available petrochemical or natural precursors. Total synthesis may be accomplished either via a linear or convergent approach. In a ''linear'' synthesis—often adequate for simple structures—several steps are performed one after another until the molecule is complete; the chemical compounds made in each step are called synthetic intermediates. Most often, each step in a synthesis refers to a separate rea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tobias Ritter
Tobias is the transliteration of the Greek which is a translation of the Hebrew biblical name he, טוֹבִיה, Toviyah, JahGod is good, label=none. With the biblical Book of Tobias being present in the Deuterocanon/Apocrypha of the Bible, Tobias is a popular male given name for both Christians and Jews in English-speaking countries, German-speaking countries, the Low Countries, and Scandinavian countries. In English-speaking countries, it is often shortened to Toby. In German, this name appears as Tobias or Tobi; in French as Tobie; and in Swedish as Tobias or Tobbe. Tobias has also been a surname. In other languages * Danish, Norwegian, German, Dutch, Swedish, Portuguese: Tobias * Amharic: ጦቢያ (T’obīya) * Catalan: Tobies * Czech: Tobiáš, Tobias * Croatian: Tobijaš * Finnish: Topias, Topi * French: Tobie * Greek: Τωβίας ''(Tobías)'' * Hebrew: Tovia, Tuvya * Hungarian: Tóbiás * Italian: Tobia (name) * Lithuanian: Tobijas * Polish: Tobiasz * Russia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organoaluminium Chemistry
Organoaluminium chemistry is the study of compounds containing bonds between carbon and aluminium. It is one of the major themes within organometallic chemistry. Illustrative organoaluminium compounds are the dimer trimethylaluminium, the monomer triisobutylaluminium, and the titanium-aluminium compound called Tebbe's reagent. The behavior of organoaluminium compounds can be understood in terms of the polarity of the C−Al bond and the high Lewis acidity of the three-coordinated species. Industrially, these compounds are mainly used for the production of polyolefins. History The first organoaluminium compound (C2H5)3Al2I3 was discovered in 1859. Organoaluminium compounds were, however, little known until the 1950s when Karl Ziegler and colleagues discovered the direct synthesis of trialkylaluminium compounds and applied these compounds to catalytic olefin polymerization. This line of research ultimately resulted in the Nobel Prize to Ziegler. Structure and bonding Aluminium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans-Georg Gellert
Hans-Georg is a given name. Notable people with the name include: *Hans-Georg Anscheidt (born 1935), Grand Prix motorcycle road racing World Champion *Hans Georg von Arnim-Boitzenburg (1583–1641), Field Marshal of Holy Roman Empire and the Electorate of Saxony, diplomat, and politician *Hans-Georg Aschenbach (born 1951), former East German ski jumper * Hans-Georg Backhaus (born 1929), German economist and philosopher * Hans Georg Berger, German-born photographer and writer who lives in Elba and in Laos *Hans-Georg Beyer (born 1956), former East German handball player who competed in the 1980 Summer Olympics *Hans Georg Bock (born 1948), German university professor for mathematics and scientific computing * Hans-Georg Bohle, German geographer and development researcher * Hans-Georg Borck (1921–2011), highly decorated Hauptmann in the Wehrmacht during World War II * Hans-Georg Bürger (1952–1980), racing driver from West Germany *Hans Georg Calmeyer (1903–1972), German lawyer w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
